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Application

SZM1 series molded case circuit breaker (hereinafter referred to as circuit breaker) is suitable for distributingnetwork of AC 50Hz (or 60Hz), rated insulation voltage690V, rated working voltage 690V or below and ratedcurrent 1250A or below. It can be used to distributeelectric energy and protect the circuit and electricequipment against overload, short circuit and undervoltage, furthermore, the circuit breakers of framesize 400A below also can protect the motor againstoverload, under voltage and short circuit. Undernormal condition, the circuit breaker also can be usedto switch the circuit and start the motor infrequently. The products are in conformity with such standards as IEC 60947-2 and GB 14048.2.